Hydro Flask® Standard Flex Straw Cap

You've been searching for the perfect solution to stay hydrated on the go, and now you can finally end your search! The StandardFlex Straw Cap wasdesigned specifically for Hydro Flask Standard Mouth bottles to simplify and improve your drinking habits. Our leak-proof cap uses Honeycomb™ insulation technology to keep your cold drinks fresh. The cap is comfortable to wear and easy to remove when you don't need it, so you don't miss a thing. Plus, each cap is free of BPA and harmful substances, so every sip is pure and delicious. So now you don't have to sacrifice performance for portability - drinking on the go just got better with the Standard Flex Straw Cap from Hydro Flask!